Manish Kumar Saini has Published 922 Answers

Inductors in Series (With and Without Mutual Inductance)

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 13:24:22

When two inductors are joined end to end i.e. finishing end of one joined to the starting end of the other and same current flows through both the inductors, then the inductors are said to be connected in series.Inductors in Series with No Mutual InductanceConsider two inductors of inductance $L_{1}$ ... Read More

Statically and Dynamically Induced EMF

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 13:16:42

Induced EMFWhen a magnetic flux linking a conductor or coil changes, an electromotive force (EMF) is induced in the conductor or coil, is known as induced EMF. Depending upon the way of bringing the change in magnetic flux, the induced EMF is of two types −Statically Induced EMFDynamically Induced EMFStatically ... Read More

Faraday’s Laws and Lenz’s Law of Electromagnetic Induction

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 13:10:24

Faraday’s Laws of Electromagnetic InductionMichael Faraday (an English scientist) performed a series of experiments to demonstrate the phenomenon of electromagnetic induction and he summed up his conclusions into two laws, known as Faraday's laws of electromagnetic induction.First Law of Electromagnetic InductionThe first law states that "when a magnetic flux linking ... Read More

Hysteresis Loss and Eddy Current Loss

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 12:57:06

Hysteresis LossWhen a magnetic material is subjected to cycle of magnetisation (i.e. it is magnetised first in one direction and then in the other), a power loss occurs due to molecular friction in the material i.e. the magnetic domains of the material resist being turned first in one direction and ... Read More

Heating Effect of Electric Current

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 12:53:57

When electric current is passed through a conductor, heat is generated in the conductor. This effect of electric current is known as heating effect of electric current.In practice, when electric current is passed through the element of an electric heater, the element of the heater becomes red hot, because the ... Read More

Force on a Current Carrying Conductor in a Magnetic Field

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 12:52:20

When a current carrying conductor is placed at right angles to a magnetic field, it is found that a force acts on the conductor in a direction perpendicular to the direction of both the magnetic field and the current.ExplanationConsider a straight conductor carrying a current of I amperes. If the ... Read More

Fleming’s Left-Hand and Right-Hand Rules Explained

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 12:44:53

An English electrical engineer and physicist Sir John Ambrose Fleming established two rules, known as Fleming's Left-Hand Rule and Fleming's Right-Hand Rule which are widely used in electrical machines.When a current carrying conductor is placed in a magnetic field, a mechanical force acts on the conductor. The direction this force ... Read More

Energy Stored in a Magnetic System

Manish Kumar Saini

Manish Kumar Saini

Updated on 23-Jul-2021 12:29:33

Consider a coil of N turns wound around a magnetic core and is connected to voltage source (see the figure).By applying KVL, we get, $$\mathrm{V = e+iR\:\:\:\:\:\:...(1)}$$Where, e is the induced EMF in the coil, R is the resistance of the coil circuit.The instantaneous power input is given by, $$\mathrm{p ... Read More

AC Motor Types: Synchronous Motor & Induction Motor

Manish Kumar Saini

Manish Kumar Saini

Updated on 22-Jul-2021 12:27:06

An AC motor is an electromechanical device which converts electrical energy input into mechanical energy. The AC motors are mainly classified into two types viz.Asynchronous or Induction MotorSynchronous MotorAsynchronous or Induction MotorAs the name implies, the asynchronous motors are the ones whose speed is not equal to synchronous speed, i.e. ... Read More

Voltage and Currents in Star and Delta Connected Systems

Manish Kumar Saini

Manish Kumar Saini

Updated on 09-Jul-2021 09:38:58

Star (Wye) Connected SystemLet VR, VY and VB represents the three phase voltages while VRY, VYB and VBR represents the line voltages. Assume that the system is balanced, so$$\mathrm{\lvert\:V_{R}\rvert=\lvert\:V_{Y}\rvert=\lvert\:V_{B}\rvert=\lvert\:V_{ph}\rvert}$$From the circuit and phasor diagram of star connected load, it can be observed that the line voltage VRY is a vector ... Read More

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